Boiler and furnace setting



(N-o Model.)

0. 0. AREY. BOILER AND FURNACE SETTING.

No. 482,147. Pat-ented se t'. 6, 1892.

INVENTOR :E M I M Fly 2 m a M; s K W W 7.0 V

UNrTED STATES PATENT QFFICEO CLARENCE O. AREY, OF CLEVELAND, OHIO.

BOILER AND FURNACE SETTING.

SPECIFICATION formng part of Letters Patent No. 482,14=7, datedSeptember 6, 1892. Application filed December 10, 1891. Renewed August12, 1892. Serial No. 442.855. (No model.)

To all whom it may concern:

Be it known that I, CLARENCE O. AREY, of the eity of Cleveland, in thecounty of Guyaloga and State of Ohio, have invented certain new anduseful Improvements in Boiler and Furnace Settings; and I do herebydeclare the following to be a clear and exact description of theinvention, such as will enable others skilled in the art to which itpertains to thoroughly understand the same.

My invention relates to improvements in boiler and furnace settings,designed to prevent and consume smoke, and also, on account of makingbettercombustion,to make a saving in the amount of fuel used. Itconsists of certain features of Construction, and in connbination ofparts hereinafter set forth.

Heretofore it has been considered impossible to dispense With the blacksmoke where soft or bituminous coal is used for fuel, and in View ofthese facts I have devised the boiler and furnace settings illustratedin the accompanying drawings, in WhlCl1- Figure 1 is a transversesection through the fire-boX, and Fi'g. 2 is a lougitudinal sectionthrough the same.

A A A' is the grate, A' being dotted to in.- dicate the position ofgrate, the grate being removed at this end to show the pockets K k.

B i's a solid metal dumping-plate to drop the ashes into the pocket b.

b b is a sloping pocket to allow ashes to drop into the ash-pit.

C C O is the bridge-walL D D D is a fiat arch above the bridgewall.

E is a duet back of the bridge-wall D for the escape of smoke.

F is a duct for the introduction of heated air.

G is a duet for the gases from the ducts E, F, and O to pass into themiXing-chamber H.

H is the miXing-ehamber.

J is a boiler or root of furnace.

K K K are narrow pockets of about the Width between grate-bars openinginto the large pocket 70.

k 70 is a large pocket in the side walls, whose bottom surface issomewhat below the bottom of the grate-bars and whose top surfaceis thewidthof the ordinary space between grate-bars above the top of thegrate-bars.

L is a clean-out hole connecting with the bottom of the duet F.

ZZ are doors to the clean-out holes.

M M is a chamber for the heating of the air supplied to the duet F. v

m is a door to regulate the quantity ot' air passing into the chamber M.

N is the ordinary combustion and soot-collecting chamber at the back ofboilers and furnaces.

O is a duet for the escape of fiamefrom the fire ff;

ffis the fire lying on the grate.

P is an arch over the duct G, which is built up tight to the boiler orroof of furnaee, so that all smoke will necessarily pass into the duetG.

' R is composed of walls and filling to make a floor at the proper levelfor the chamber H.

S is a wall at the back of the chamber H to cause an eddy andconsequently a more thorough mixing of the gases.

T T T are the iuclosing walls of the boiler or other furnace.

V is the front of the boiler or other furnace.

The fire having been started and a bed of incandescent fuel havingaccumulated on the grate A, reaching above the bottom of the arch D,fresh fuel is thrown into the furnace, when combustion takes place, inthe follow ing manner: Air enters the large pockets 70 and passing upthrough the branch pockets K of the pockets 75 is heated to a very hightemperature by passing against the sides of the fire, and then it entersthe firebox over the surface of the fire and mingling with the gasesimproves combustion. From the body of the incandescent fuel ffa sheet ofpure fiame passes out through the duct O and into the duet G. The smokefrom the fresh fuel on the surface of the fire rises and passes over thetop of the arch D, then down the duet E to where it iningles With thejet of flame from O and the jet of heated air from the duet F. The doorm being open allows air to pass into the chaniber or duct M, where itreceives heat through the ro'of n f rom the heated gases in the chamberN. This heated air passes onward and up through the duct F till itreaches the intersection of the ducts O, E, F, and G. Here the jet offlame from O,the smoke from E, and the heated air from F meet and passinto the duet G, and

IOO

then into the mixing-chamber H, where they strike the wall S, thus beingcompletely mixed, and the carbon of the smoke that comes down the duet Ebeing thoroughly mixed with the heated air from F at a very hightemperature caused by the flame from O unites with the oxygen of the airand forms carbonic dioxide, only a small part of the carbon escaping ina free state. The doors ll are always kept shut, except when cleaning,as they would allow cold air to enter the duet F. The dumpingp'ate Bismadepreferably solid, as too much unheated air reduces the temperatureof the flame that passes through O.

I have reduced my invention to practice in all its more essential parts,and find that it burns soft coal with greater economy and less smokethan any apparatus which I have seen.

The essential features of my inventio are the pockets in the side wallsand the ducts, walls, and chanbers arranged as heretofore described. Thecleaning-doors l l and the dumping-plate B add to the convenience ofhandling, but are not essential.

What I claim is- 1. The combination, in the fire-box of a boiler orother furnace, of narrow ascending side pockets with a large lowerconnectingpocket whose axis is nearly parallel with the surface of thegrate, with a du'ct at the back edge of the grate and near its level,with an arch or lintel directly over this duet that does not extend upto the boiler or roof of furnace, with a descending duct immediatelybehind this arch or lintel, with an ascending duet immediately below thedescending duet, which is connected into a chamber at the rearunderneath the rear combnstion-chamber, this under chamber connectingwith the air out-` side by means of a regulating-door, with a nearlyhorizontal duet just in the rear of the duet from the back edge of thegrate, with a chamber at the back of this duct which opens only intothis duct and at its upper back surface, with a wall between thedescending duct and the last-named chamber, resting upon an arch orlintel over the rear horizontal duet and extending up tight to theboiler or root' of furnace.

2. The combination, in the fire-box of a boiler or other furnace, of aduet from the back edge of the grate, with another duet intersecting thefirst duct and connecting at its top with the fire-chanber and at itsbottom with a chamber connected with the outer air, with a wall over thefirst duet and in the rear of the second duct, which extends up tight tothe boiler or roof of the furnace.

3. The combination, in the fire-box of a boiler or other furnace, of abridge-wall runnin g above the grate-level,with a duet at about thegrate-1eve1,with a dumping-plate formin g the floor of said duet, witha. wall slightly in the rear of the bridge-wall, rcsting on an arch orlintel and continuing up-tight to the boiler or roof of furnace.

4. The'combination, in the Construction of the combustion-chanbers ot'a' boiler or other -furnace, of two ducts` from the fire-chamber,

one above the other, with a duct passing from outside under the rearcombustion-chamber, with a duct passing into the rear combustionchamber,all four ducts meeting at a common point.

CLARENCE O. AREY. VVitnesses:

OTIS C. BENTON, W. .T. WHITE.

